Attracttion to the erotic or cultural dynamics of queer identities, cultures, sexualities, affectionalities, etc. Queersexual is a nongendered sexuality.

Part 1: "Are you a dyke or what?"
Part 2: "You mean lesbian?"
Part 3: "yeah."
Part 4: "Well, I am a dyke but I'm not a lesbian. But, I'm also fag, but I'm not a gay man. And my partner is a nongendered intersex fag."
Part 5: "So then, you're bisexual or something?"
Part 6: "No, there are more than two sexes."
Part 7: "What then, Omnisexual?"
Part 8: "Not exactly. You see, I'm queersexual."

To be attracted to people of all genders, but only if they're homosexual; i.e. idiots who are unintentionally giving fodder to religious-right nutbags by making an obvious mental decision to be attracted to someone based entirely off of their sexual identities, which is in itself being attracted to the assumed image of that sexual identity.